Testing-machine.



H. B. KUHNER, DECD. n. 1.. xummn, nxnou'rmx.

TESTING MACHINE. APPLIOATION FILED JULY 16, 1918. 1,107,619. Patented Aug. 18, 19m

2 BHEETB-8HEET l.

-ginuammuannnm H. E. KUHNER, DEGD.

B. L KUHNER, EXECUTE-IX.

TESTING MACHINE. Arum-c110 FILED JULY 15,1913.

Patented Aug. 18, 19141 2 SHEETS-SHEET 2.

wilwwoom through the brake UNITED "STATES PATENT ()FFICE;

HERMAN E. ,KUHNER, OF OXFORD, MARYLAND; ROSE I. KUHNEB EXEOUTBIX OF SAID HERMAN E. KUHNER, DECEASED.

TESTING-MACHINE.

v I Specification 01' Letters Patent.

Patented Aug. 1a, 1914.

Application filed July 15, 1913. Serial No. 779,184.

To all whom it may concern:

Be it known that I, HERMAN a citizen of the United States, residinsg at Oxford, in 'the county of Talbot and tate of Mar land, have invented certain new and useful improvements in Testing-Machines; and I do hereby declare the following to be aafull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. 1

This invention relates to machines for testing motor cars; novel construction and combination of the parts hereinafter fully described and claimed whereby the working of the motor. and its transmission gearing can be tested while the motor car 1s stationary and Its engine is running. under a load approximating to the load of runnin the car on a road.

This machine is specia ly useful for testing a motor in a' arage, after it has been repaired, to ascertam for certain that all de iects have been remedied. It isalso used to teach a new car owner or driver the working of a motorcar .with the e e running, before taking the car on the road, so thathe becomes familiar with the various levers'and valves, and only has to learn the use of the steering devices subsequently when on the road.

In the drawings, a. testing machine constructed according to this inventionwith one of the driving leys'removed. Fig. 2 is a plan view: of testing machine. 3 is a cross-section taken on the line 21-4 in Fig.1; The testin frame or true that it can be moved wage or workshop with facility. The rame 2 isprovided its middle art, and a shaft 5-is secured 1n these uprigts, and extendsacross the machine at a convenient he ght above the ground or. floor. Two arms 6 have their rear end portions pivoted on the shaft 5, and have sides of their front end. portions for engaging with the rear axle or any other convenient part of a, motor'car.

ifting devices are, provided for raising the ms si l aneously so as. o support he machine, is mounted on a 2 having ground wheels 3.so

E. Kunmm,

and it consists in the Figure 1 isa side view ofcarried by the .slides 28.

about on the floor of awith two uprightsa at bearingsorrecesses 7 .in the upper threaded nut or. bracket by pivot ins 10, and the pin holes in the ting screws 9 are arms are e ongated soas to permit the screws 4 to move vertically.

The lifting screws. engage with nuts 12 whlch are journaled in bearings 14, and the bearings. 14 are supported by a crossbar 15 secure to the front end portion of the truck or frame. Each nut- 12 has a beveled toothed wheel 16 secured-to it, and each wheel 16 is earings 19 on the crossbar 15, and the wheels are arranged so that both arms are raised when the shaft 18 is revolved in one direction. When the wheels 17 are arranged as shown the lifting screws 9 have right and left hand screw threads respectively. The shaft 18 has a beveled toothed curedon it ,which toothed wheel 21 shaft 22. V

The shaft 22wis journaled in a bearing 23 secured to the. crossbar 15, and in a bearing gears into a beveled secured on a longitudinal 24 secured to theshaft 5, and the'shaft 22 is provided at its rearend with a handle 25 for revolving it. Slides 28 are provided and are arranged. to: move longitudinally in the guides or guide slots 8 of the arms 6, and azbrake shaft 30 is journaled in bearings 29 are preferabl roller bearings. I

riction riving ulleys or Wheels 31 are secured on the end portions of the brake shaft 30, and are arranged to bear against the driving road wheels of a motor car when its axle is asupportedsby the arms 6.- The pulleys 31 may have their peri heries corrugated or roughened, if desire ,to prevent slip. Each slide. 28 has a feed screw 32 journaled in a bearing33 at itslear part. Each feed screw is provided atits with a handle 34;- or other appr The bearings 29 for revolving 1t, and 1t engageswuthascrewsecured tofthe rear end portion of the arm 6 pertaining to it. he screws 32 .adjusttheupositionszof the driving p ll ys. nd .press'them into llh driving engagement with the driving road wheels of the motor car.

A brake 36 of approved construction is arranged on the middle part of the shaft 30, and is inclosed in a casing 37. This brake preferably consists of a series of disks splined to the shaft 30, and a second series of alternating disks splined to the casing 87. The casing has a cover plate 38 on one side and a hub 39 which is screwthreaded. Pins 40 are slidable in holes in the plate 38, and a handwheel 41 is screwed on the hub 39 and bears against the projecting end of the pins 40. When volved to force the pins inwardly of the casing, he disks are pressed into frictional engagement with each other, and the frictional resistance is varied atwill by the handwheel.

A brake lever 42 projects rearwardly from the casing 37 and a weight 43 is provided at the front part of the casing, and is adjusted so as to balance the brake lever. ,A support 44 is secured to the truck or frame, and a testing-scale 45 is suspended from the support 44 and is connected to the rear end of the brake lever. This testing-scale has a pointer 46 and a dial 47, and it is preferably a spring scale or balance of any approved construction. The testin -scale indicates the load on the engine-oft e motor car when the brake hand-wheel is screwed up to apply driving. pulleys 31 are the brake, and the being revolved by the road wheels of'the motor car.

The testing-scale can be arranged to indicate the brake horsepower of the motor, but this is of less importance than the opportunity afl'orded by the machine to test the running mechanism and motor of the car under load and before letting the motor car go out on the road. The wheeled truck is run upon the floor of the garage, so that the bearings 7 come under the axle of the. motor car to be tested. The axle is then raised by the pivoted arms, and the driving pulleys 31 are slid forward into engagement with the car Wheels. The weight of the car on the recessed bearings 7 prevents the wheeled truck from moving while the motor car is being tested.

What I claim is:

1. In a testing machine, the combination, with a supporting frame, of arms pivoted to the frame and adapted to support 'a'motor car, lifting mechanism for raising and lowering the said arms, slides on the said arms, a shaft carried by the said slides, driving pulleys on the said shaft, means for pressing the driving pulleys against the driving wheels of the motor car, and brake mechanism for controlling the speed of the said driving pulleys.

9. In a testing. machine, the combination,

' with wheeled truck, of arms pivoted at one the hand wheel is re-' scale supported from end to the truck and having recessed bearings on the upper sides of their free end portions for engaging with a motor car, lifting mechanism for raising and lowering the said arms, slides on the said arms, a shaft carried by the said slides, driving pulleys on the said shaft, means for pressing the driving pulleys against the driving wheels of the motor car, and brake mechanism for controlling the speed of the said driving pulleys.

3. In a testing machine, the combination, with a supporting frame, of arms having their rear ends pivoted to the frame and provided at their front end portions with bearings for supporting a motor car, lifting screws pivoted to the middle parts of the said arms, nuts journaled in the frame and engaging with the mechanism for revolving the nuts sim aneously to raise and lower the arms, slides on the said arms, a shaft carried by the said slides, driving pulleys on the said shaft, means for pressing the driving pulleys against the driving Wheels of the motor car, and brake mechanism for controlling the speed of the said driving pulleys.

4. In a testing machine, the combination, with a supporting frame, of arms pivoted to the frame and adapted to support a motor car, lifting mechanism for raising and lowering the said arms, slides on the said arms, a shaft carried by the said slides, drivin'g pulleys on the said shaft, screwthreaded brackets secured to the said arms, revoluble adjusting screws working in the said brackets and arranged parallel to the said arms and in operative connection with the slides, and brake mechanism for controlling the spee of the said driving pullcys.

5. .n a testing machine, the combination, with a supporting frame, of arms pivoted to the frame and adapted to support a motor car, lifting mechanism for raising and lowering the said arms, slides on the said arms, a shaft carried by the said slides, driving pulleys on the said shaft, means for pressing the driving pulleys against the'driving wheels of the motor car, a brake casing mounted loose y on the said shaft and provided with a scr wthreaded hub, a friction brake arranged in the casing, pins slidable in the casing and adapted to apply the brake, a handewheel screwed on the said hub and bearing against the said pins, a brake lever secured to the 'said casing, and a testing the said frame and connected to the brake lever.

6. In a testing machine, the combination, with a support for holding a motor car with its driving ground wheels free of the weight of the car, of friction contact devices, means for pressing the contact devices against the said ground wheels to afiord a predetermined resistance to their revolution, and brake mechanism for adjusting the resistilh lifting screws, driving ate ance of the contact devices independently of controlling the speed and resistance of the their pressure against the said ground contact wheels independently of the pressing wheels. mechanism.

7. In a testing machine, the combination, In testimony whereof I have aflixed my a with a support for holdilngfa montil'1 car with signature in the presence of tWO witnesses. 16

its driving ground w iee s ree o e weig t 1 of the car, of friction contact wheels, ad- HERMAN KUHNER' ustable pressing mechanism for holding the Witnesses: imtact wheels in engagement with the said J. H. Lewis gigl'ound wheels, and ,4 rake mechanism for FRANKLIN (lmmm, 

